| Overload | Description |
|---|---|
| Add(C1TreeColumn) | Adds the new column of tree to the collection. |
| Add(String) | Adds the new column of tree with specified name to the collection. |
| Add(String,String) | Adds the new column of tree with specified name and display field name to the collection. |
| Add(String,String,String) | Adds the new column of tree to the collection. |